Bathtub



FIG. 1 is a front elevational view of a bathtub showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a left side elevational view thereof, the right side being a mirror image of the left side shown;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a front elevational view of a modified form of the bathtub shown in FIG. 1, the sides and rear being the same as the front shown;

FIG. 7 is a top plan view of FIG. 6; and,

FIG. 8 is a bottom plan view of FIG. 6. 

The ornamental design for a bathtub, as shown and described. 